Soft orthopedic casting article with reinforcement system

The present invention provides a reinforceable orthopedic casting article comprising a backing and a curable resin having an activator capable of assisting in the initiation of the cure of an addition polymerizable reinforcement compound. Reinforced casts are made by providing a curable casting tape comprising a backing and a curable resin containing an activator capable of assisting in the initiation of the cure of an addition polymerizable reinforcement compound; initiating the cure of the casting tape; wrapping the casting tape into the form of a cast; applying a hardenable reinforcement compound to at least a portion of the casting tape; and allowing the casting tape to cure and the reinforcement compound to harden to form a reinforced orthopedic cast. In another method a reinforced soft cast is made by wrapping a soft casting tape into the form of a cast, wherein the casting tape comprises a backing and a curable resin; initiating the cure of the casting tape; applying an activated addition polymerizable reinforcement compound to at least a portion of the casting tape; and allowing the casting tape to cure and the reinforcement compound to harden to form a reinforced orthopedic cast.

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Claims

1. A reinforceable orthopedic casting article, comprising:

a backing; and
a curable resin comprising an activator, wherein the activator comprises an active reducing component of a redox pair and is present in a sufficient amount to assist in the initiation of the cure of an addition polymerizable reinforcement compound, and thereby reinforce the treated area of the casting article.

2. The casting article of claim 1, wherein the curable resin is selected from the group consisting of water-curable isocyanate-functional prepolymers, polyurethanes, cyanoacrylate esters, epoxy resins, prepolymers terminated at their ends with trialkoxy- or trihalo-silane groups, water-curable alkoxy silane terminated oligomers, and water-reactive liquid organometallic compounds.

3. The casting article of claim 1, wherein the activator is selected from the group consisting of ferrous sulphate, sodium sulphite, sodium dithionite, sodium thiosulphate, ferrous chloride, sodium metabisulphite, organic salts and amines.

4. The casting article of claim 1, wherein the activator comprises a tertiary amine.

5. The casting article of claim 1, wherein the article is in the form of an orthopedic casting tape.

6. The casting article of claim 1, wherein the article is in the form of a soft orthopedic casting tape.

7. A method of making an orthopedic cast, comprising the steps of:

providing a curable casting tape comprising a backing and a curable resin comprising an activator capable of assisting in the initiation of the cure of an addition polymerizable reinforcement compound, wherein the activator comprises an active reducing component of a redox pair, and the reinforcement compound comprises an oxidizing component of the redox pair;
initiating the cure of the casting tape;
wrapping the casting tape into the form of a cast;
applying the reinforcement compound to at least a portion of the casting tape; and
allowing the casting tape to cure and the reinforcement compound to harden to form a reinforced orthopedic cast.

8. The method of claim 7, wherein the reinforcement compound is applied to at least a portion of the casting tape between adjacent layers of the wrapped cast.

9. The method of claim 7, wherein the portion of the casting tape that comprises the reinforcement compound comprises a longitudinal strip of the cast.

10. The method of claim 7, wherein the curable resin is selected from the group consisting of water-curable isocyanate-functional prepolymers, polyurethanes, cyanoacrylate esters, epoxy resins, prepolymers terminated at their ends with trialkoxy- or trihalo-silane groups, water-curable alkoxy silane terminated oligomers, and water-reactive liquid organometallic compounds.

11. The method of claim 7, wherein the oxidizing component is selected from the group consisting of dialkyl peroxides and diacyl peroxides.

12. The method of claim 7, wherein the activator comprises a tertiary amine.

13. The method of claim 7, wherein the cast is a soft cast.

14. A method of making an orthopedic cast, comprising the steps of:

wrapping a soft casting tape into the form of a cast, wherein the casting tape comprises a backing and a curable resin;
initiating the cure of the casting tape;
applying an activated addition polymerizable reinforcement compound to at least a portion of the casting tape, wherein the reinforcement compound is selected from the group consisting of multi-part compositions comprising a redox pair that are mixed together prior to being applied to the cast and compositions comprising visible light cure catalyst; and
allowing the casting tape to cure and the reinforcement compound to harden to form a reinforced orthopedic cast.

15. The method of claim 14, wherein the curable resin comprises a water-curable resin.

16. The method of claim 14, wherein the mixing is done using a static mixer.

17. The method of claim 14, wherein the reinforcement compound comprises a methacrylate.

18. The method of claim 14, wherein the catalyst is camphorquinone.

19. A kit for making an orthopedic cast, comprising:

a casting tape comprising an activator; and
an addition polymerizable reinforcement compound, wherein the activator provided with the casting tape comprises an active reducing component of a redox pair and is present in a sufficient quantity to cause hardening of the reinforcement compound when the reinforcement compound is applied to the casting tape.
Referenced Cited
U.S. Patent Documents
3630194 December 1971 Boardman
3908644 September 1975 Neinart et al.
3954475 May 4, 1976 Bonham et al.
3968791 July 13, 1976 Forsberg
4212970 July 15, 1980 Iwasaki
4214578 July 29, 1980 Gianakakos et al.
4298711 November 3, 1981 Moulson et al.
4376438 March 15, 1983 Straube et al.
4426504 January 17, 1984 Nandi
4433680 February 28, 1984 Yoon
4502479 March 5, 1985 Garwood et al.
4539382 September 3, 1985 Omura et al.
4609578 September 2, 1986 Reed
4667661 May 26, 1987 Scholz et al.
4668563 May 26, 1987 Buese et al.
4672956 June 16, 1987 Potter et al.
4690842 September 1, 1987 Kammerer et al.
4705840 November 10, 1987 Buckanin
4774937 October 4, 1988 Scholz et al.
4899738 February 13, 1990 Parker
4968542 November 6, 1990 Gasper et al.
5014403 May 14, 1991 Buese
5027803 July 2, 1991 Scholz et al.
5090405 February 25, 1992 Jansen et al.
5154762 October 13, 1992 Mitra et al.
5346939 September 13, 1994 Moren et al.
5353486 October 11, 1994 Schmidt et al.
5354259 October 11, 1994 Scholz et al.
5364693 November 15, 1994 Moren et al.
5405643 April 11, 1995 Scholz
5423735 June 13, 1995 Callinan et al.
5474522 December 12, 1995 Scholz et al.
5545676 August 13, 1996 Palazzotto et al.
Foreign Patent Documents
0 086 621 August 1983 EPX
0 407 056 A2 January 1991 EPX
WO 88/05652 August 1988 WOX
WO 94/25076 November 1994 WOX
Other references
  • Noller, Carl R. ,Chemistry of Organic Compounds, Second Edition, 1957, pp. 121-122.
Patent History
Patent number: 5913840
Type: Grant
Filed: Aug 15, 1997
Date of Patent: Jun 22, 1999
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Inventors: Kurt Allenberg (Woodbury, MN), Joel D. Oxman (St. Louis Park, MN), Charles C. Polta (St. Paul, MN)
Primary Examiner: Jerome W. Donnelly
Assistant Examiner: Kelvin Hunt
Attorney: F. Andrew Ubel
Application Number: 8/911,740
Classifications
Current U.S. Class: By Chemically Reactive Material (e.g., Plaster Cast) (602/8); By Chemically Reactive Material (e.g., Plaster Cast) (602/8); 428/35
International Classification: A61L 1500; A61F 1300;